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란타노이드계 페롭스카이트형 촉매에서 입자상물질의 산화반응
조경목,오광중,박대원,홍성수,양진섭,류봉기 한국공업화학회 1998 응용화학 Vol.2 No.1
We have studied the catalytic combustion of soot particulate over perovskitetype oxides prepared by malic acid method. The catalysts were modified to enhance the activity by substitution of metal into A or B site of perovskite oxide. In addition, the reaction conditions, such as temperature, O₂ concentration, space velocity have been studied. The effect of SO₂ pretreatment and water introduced into reactants were also examined. In the LaCoO₃ catalyst, the partial substitution of alkali metals into A site enhanced the catalytic activity in the combustion of soot particulate and the activity was shown in the order: Cs$gt;K$gt;Na; In the Lao_0.6Cs_(0.4)CoO₃ catalyst, the substitution of Fe or Mn showed no effect on the ignition temperature. The ignition temperature decreased with increasing O₂ concentration and contact time. The introduction of water into reactants feed decreased the ignition temperature and the pretreatment of SO₂ showed no effect on the catalytic activity.
조경목,오광중,박대원,홍성수,양진섭,류봉기 한국공업화학회 1997 응용화학 Vol.1 No.2
Catalytic removal of soot particulate in the presence of excess oxygen was investigated over perovskite-type oxides by using temperature programmed reaction(TPR) in which carbon particulate/catalyst mixture was heated in the reaction gas containing nitric oxide and oxygen. LaCoO₃ catalyst was modified to enhance the activity by substitution of metal ion into A and B sites. The reaction conditions was also examined.